Found this interesting article on how freeriding might become the future of MTB. Here are some quotes from the article..
"Freeriding is also accessible. With the US and Canada seeing increasing urbanization (and suburbanization) it’s becoming more and more difficult to site and build large scale mountain bike trail networks. Freeride courses, on the other hand, can be much more compact since stunts can be combined in different ways each time around the course. Freeride stunts can even be found indoors at places like Rays Indoor MTB Park and kids who live in cities can use urban or trials rides to hone freeriding skills."
Yes, that is true, even with the ever powerful IMBA and BMA Boulder still has to fight HARD to get more trail access however finding spots like the CU Research Park are popping up more often(east boulder, gunbarrel, Denver, etc). The Boulder Velodrome just recently opened up their mountain bike terrain section. The Valmont Park IS getting built and then there is a rumored Denver Mountain Bike Park